/* ===== SynthoMing 合成生物学冒险之旅 · 共享设计系统 ===== */
:root{
  --ming:#34d399; --ming-d:#059669; --ink:#0f2e24; --paper:#f4fbf7;
  --card:#ffffff; --line:#d7ede3; --accent:#fbbf24; --pink:#f472b6;
  --blue:#60a5fa; --purple:#a78bfa; --shadow:0 10px 30px rgba(5,150,105,.12);
  --fs:17px; --radius:22px;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:"PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  background:radial-gradient(circle at 20% 0%,#e7fbf1,#f4fbf7 40%) fixed;
  color:var(--ink);font-size:var(--fs);line-height:1.85;-webkit-font-smoothing:antialiased}
body[data-age="senior"]{--fs:21px;line-height:2.1}
.wrap{max-width:880px;margin:0 auto;padding:20px 18px 80px}

/* 顶栏 */
.topbar{position:sticky;top:0;z-index:50;background:rgba(244,251,247,.9);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line);
  display:flex;align-items:center;gap:12px;padding:10px 14px;border-radius:0 0 18px 18px}
.brand{font-weight:800;font-size:.95em;color:var(--ming-d);white-space:nowrap}
.brand a{color:inherit;text-decoration:none}
.brand small{display:block;font-weight:500;color:#6b9e8c;font-size:.7em}
.ages{margin-left:auto;display:flex;gap:6px;flex-wrap:wrap}
.age-btn{border:1.5px solid var(--line);background:#fff;border-radius:999px;
  padding:5px 11px;font-size:.78em;cursor:pointer;transition:.15s;color:#3d6b5a}
.age-btn.on{background:var(--ming);border-color:var(--ming);color:#fff;box-shadow:var(--shadow)}
.progress{height:6px;background:#dcefe5;border-radius:99px;margin:12px 0 0;overflow:hidden}
.progress>i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--ming),var(--accent));transition:.4s}

/* 卡片 */
section{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 24px;margin:22px 0;box-shadow:var(--shadow)}
.kicker{display:inline-block;font-size:.72em;font-weight:700;letter-spacing:.12em;
  color:var(--ming-d);background:#dcfce7;padding:4px 12px;border-radius:99px;margin-bottom:12px}
h1{font-size:1.9em;line-height:1.3;margin:6px 0 14px}
h2{font-size:1.4em;margin:4px 0 14px;display:flex;align-items:center;gap:10px}
h2 .ic{font-size:1.1em}
p{margin:10px 0}
.lead{font-size:1.08em;color:#2c5a49}
.depth{display:none}
.depth.show{display:block;animation:fade .3s}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1}}

/* SynthoMing 形象 / 气泡 */
.ming-stage{display:flex;flex-direction:column;align-items:center;gap:10px;text-align:center}
.bubble{background:#fffdf5;border:2px dashed var(--accent);border-radius:18px;
  padding:12px 18px;max-width:520px;font-size:.98em;position:relative}
.bubble::after{content:"";position:absolute;bottom:-12px;left:50%;transform:translateX(-50%);
  border:8px solid transparent;border-top-color:var(--accent)}

/* 交互区 */
.inter{background:#f0fdf4;border:1.5px solid #bbf7d0;border-radius:18px;padding:20px;margin:18px 0}
.inter h3{font-size:1.08em;margin-bottom:6px;color:var(--ming-d);display:flex;gap:8px;align-items:center}
.tag{font-size:.68em;background:var(--accent);color:#4a3500;padding:3px 9px;border-radius:99px;font-weight:700}
.btn{background:var(--ming);color:#fff;border:none;border-radius:12px;padding:9px 18px;
  font-size:.92em;font-weight:600;cursor:pointer;transition:.15s}
.btn:hover{background:var(--ming-d);transform:translateY(-1px)}
.btn.ghost{background:#fff;color:var(--ming-d);border:1.5px solid var(--ming)}
.feedback{margin-top:12px;font-weight:600;min-height:1.4em}
.ok{color:var(--ming-d)} .no{color:#dc2626}

/* 答题 */
.opt{display:block;width:100%;text-align:left;background:#fff;border:1.5px solid var(--line);
  border-radius:12px;padding:11px 15px;margin:8px 0;cursor:pointer;transition:.15s;font-size:.95em}
.opt:hover{border-color:var(--ming);background:#f0fdf4}
.opt.correct{background:#dcfce7;border-color:var(--ming)}
.opt.wrong{background:#fee2e2;border-color:#f87171}

/* 拖拽 */
.drag-zone{display:flex;gap:10px;flex-wrap:wrap;margin:14px 0}
.chip{background:#fff;border:2px solid var(--line);border-radius:12px;padding:10px 14px;
  cursor:grab;font-weight:700;user-select:none;transition:.15s;font-size:1em}
.chip:active{cursor:grabbing}
.slots{display:flex;flex-direction:column;gap:10px;margin:14px 0}
.slot{display:flex;align-items:center;gap:12px;background:#fff;border:1px dashed #94d3b8;
  border-radius:12px;padding:10px 14px;min-height:54px}
.slot .label{flex:1;color:#3d6b5a;font-size:.92em}
.dropbox{min-width:120px;min-height:40px;border:2px dashed #bbf7d0;border-radius:10px;
  display:flex;align-items:center;justify-content:center;color:#9fc7b6;font-size:.85em}
.dropbox.filled{border-style:solid}
.dropbox.right{background:#dcfce7;border-color:var(--ming)}
.dropbox.wrong{background:#fee2e2;border-color:#f87171}

/* 虚拟实验室 */
.lab{background:linear-gradient(160deg,#0f2e24,#134e4a);color:#d1fae5;border-radius:18px;padding:22px;margin:16px 0}
.lab h3{color:#6ee7b7}
.dish{width:180px;height:180px;border-radius:50%;margin:18px auto;position:relative;
  background:#1e3a34;border:6px solid #2a4f47;transition:.4s;overflow:hidden}
.dish .glow{position:absolute;inset:0;border-radius:50%;opacity:0;transition:.5s;filter:blur(2px)}
.sliders label{display:block;margin:14px 0 4px;font-size:.85em;color:#a7f3d0}
.sliders input{width:100%}
.readout{text-align:center;font-size:.9em;margin-top:8px;color:#6ee7b7;min-height:1.4em}

/* 实验步骤 */
.steps{counter-reset:s;margin:12px 0}
.step{display:flex;gap:14px;padding:12px 0;border-bottom:1px dashed var(--line)}
.step:last-child{border:none}
.step .n{counter-increment:s;flex:0 0 34px;height:34px;border-radius:50%;background:var(--ming);
  color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800}
.step .n::before{content:counter(s)}
.warn{background:#fffbeb;border:1px solid #fde68a;border-radius:12px;padding:12px 16px;font-size:.9em;margin:12px 0}

/* 思考 / 挑战 */
.think{background:#faf5ff;border:1.5px solid #e9d5ff;border-radius:18px;padding:20px;margin:16px 0}
.think h3{color:#7c3aed}
textarea{width:100%;border:1.5px solid var(--line);border-radius:12px;padding:12px;
  font-family:inherit;font-size:.95em;resize:vertical;min-height:80px;margin-top:8px}
.quest{background:linear-gradient(135deg,#fef3c7,#fde68a);border-radius:18px;padding:22px;margin:16px 0;border:1px solid #fcd34d}
.quest h3{color:#92400e}
.badge{display:inline-flex;align-items:center;gap:6px;background:#fff;border:2px solid var(--accent);
  border-radius:99px;padding:6px 14px;font-weight:700;color:#92400e;font-size:.85em;margin:4px}

.next{text-align:center;background:linear-gradient(135deg,var(--ming),var(--ming-d));color:#fff}
.next h2{justify-content:center;color:#fff}
.next .btn{background:#fff;color:var(--ming-d);margin-top:10px}
.foot{text-align:center;color:#7aa898;font-size:.8em;margin-top:30px}
figure{margin:18px 0;text-align:center}
figcaption{font-size:.82em;color:#6b9e8c;margin-top:8px}
svg{max-width:100%;height:auto}

/* 插画 */
.illus{width:100%;border-radius:18px;box-shadow:var(--shadow);display:block;margin:6px auto}
.hero{border-radius:var(--radius);overflow:hidden;margin-bottom:0;box-shadow:var(--shadow)}
.hero img{width:100%;display:block}
/* 标题条移到图片下方实心栏，不再压在 AI 图自带标题上 */
.hero .titleband{padding:14px 22px;background:#fff;border-top:3px solid var(--ming)}
.hero h1{margin:0;font-size:1.5em;color:var(--ming-d)}
.hero .sub{color:#3d6b5a;font-weight:600;font-size:.9em;margin-top:2px}
.sticker{width:64px;height:64px;object-fit:contain;vertical-align:middle;flex:0 0 auto}
.row{display:flex;align-items:center;gap:14px}

/* 配音按钮 */
.tts-btn{display:inline-flex;align-items:center;gap:7px;background:#fff;color:var(--ming-d);
  border:1.5px solid var(--ming);border-radius:999px;padding:6px 14px;font-size:.85em;
  font-weight:600;cursor:pointer;transition:.15s;margin:4px 0}
.tts-btn:hover{background:var(--ming);color:#fff}
.tts-btn.playing{background:var(--ming);color:#fff;animation:pulse 1.2s infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(52,211,153,.5)}50%{box-shadow:0 0 0 8px rgba(52,211,153,0)}}
.tts-wave{display:inline-flex;gap:2px;align-items:flex-end;height:14px}
.tts-wave i{width:3px;background:currentColor;border-radius:2px;height:5px}
.tts-btn.playing .tts-wave i{animation:wv .7s infinite ease-in-out}
.tts-btn.playing .tts-wave i:nth-child(2){animation-delay:.15s}
.tts-btn.playing .tts-wave i:nth-child(3){animation-delay:.3s}
@keyframes wv{0%,100%{height:5px}50%{height:14px}}

/* ===== 移动端适配 ===== */
@media (max-width:560px){
  :root{ --fs:16px; }
  body[data-age="senior"]{ --fs:19px; }
  .wrap{ padding:14px 12px 60px; }
  section{ padding:18px 15px; margin:16px 0; border-radius:18px; }

  /* 顶栏保持单行：品牌缩小，年龄按钮只留 emoji */
  .topbar{ gap:8px; padding:8px 10px; }
  .brand{ font-size:.8em; }
  .brand small{ font-size:.78em; }
  .ages{ gap:4px; flex-wrap:nowrap; }
  .age-btn{ padding:6px 8px; font-size:1em; line-height:1; }
  .age-btn .lbl{ display:none; }       /* 隐藏文字，只显示 emoji */

  h1{ font-size:1.5em; }
  h2{ font-size:1.2em; }
  .hero h1{ font-size:1.25em; }

  /* 让横向元素组在窄屏可横向滚动而非错位换行 */
  .dnastrip, .codon-row, .flow, .switches, .timeline,
  .cyc, .step3, .gatepick{ flex-wrap:nowrap; overflow-x:auto;
    -webkit-overflow-scrolling:touch; padding-bottom:4px; }

  .grid{ grid-template-columns:1fr 1fr; gap:10px; }
  .jobgrid,.pickgrid{ grid-template-columns:1fr 1fr; }
  .sticker{ width:54px; height:54px; }
  textarea{ font-size:16px; }          /* iOS 防止聚焦缩放 */
}